WIMBLEDON, England (AP) — Serena Williams plans to make her return to singles competition via a wild-card entry at Wimbledon, where matches begin on Monday.

Williams is a seven-time champion in singles at the All England Club, part of her collection of 23 career Grand Slam titles, a record in the professional era (which dates to 1968).

The 40-year-old American won two matches in doubles alongside Ons Jabeur this week at a grass-court tournament in Eastbourne; before that, Williams had not played any sort of official contest anywhere since injuring her right leg and needing to stop during the first set of her first-round match on Centre Court at Wimbledon a year ago.

This is not the first comeback from a significant absence for Williams.

Here is a look at other times she missed two or more consecutive Grand Slam tournaments since making her major championship debut at the 1998 Australian Open:

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When Williams Was Sidelined: 2003-04

Why: Left knee surgery to repair a partial tear in the quadriceps tendon

Grand Slam Tournaments Missed: 2 — 2003 U.S. Open and 2004 Australian Open

Age at Return: 22

How Many Majors Until Reaching a Final After Return: 2 (Runner-up at Wimbledon in 2004)

What Williams Said Then: “I’m going to be a better player, for sure, when I come back. My knee is going to be better than it’s been ever in my career, which is really exciting, and … I’m going to be mentally relaxed. I’m going to be stronger, and I’m going to be angry.”

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When Williams Was Sidelined: 2006

Why: Left knee pain

Grand Slam Tournaments Missed: 2 — 2006 French Open and 2006 Wimbledon

Age at Return: 24

How Many Majors Until Reaching a Final After Return: 2 (Champion at Australian Open in 2007)

What Williams Said Then: “Like I always say, when I’m playing well, it’s hard for anyone to beat me. It’s just a fact. I think a lot of people understand that. I don’t think anyone that has to play me goes home and shouts with joy.”

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When Williams Was Sidelined: 2010-11

Why: Two operations on her right foot after cutting it on glass at a restaurant, followed by blood clots in her lung and a large gathering of blood under the skin on her stomach

Grand Slam Tournaments Missed: 3 — 2010 U.S. Open, 2011 Australian Open, 2011 French Open

Age at Return: 29

How Many Majors Until Reaching a Final After Return: 2 (Runner-up at U.S. Open in 2011)

What Williams Said Then: “Mentally, I was just down. But I think that’s normal. That is expected. … I was just pretty upset and just wondering when this string of things would stop happening.”

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When Williams Was Sidelined: 2017-18

Why: Pregnancy; complications when her daughter was born

Grand Slam Tournaments Missed: 4 — 2017 French Open, 2017 Wimbledon, 2017 U.S. Open, 2018 Australian Open

Age at Return: 36

How Many Majors Until Reaching a Final After Return: 2 (Runner-up at Wimbledon in 2018)

What Williams Said Then: “I don’t think I ever actually lost that competitive side. In fact, I feel like it’s stronger, because I’ve been through so much.”

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